Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Thu Jan 22 05:56:53 2026 Auto Mode Machine = Linux oleg422-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg422-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 4184 13397 104416 307554 64 8 3655 15698 302018 177324 64 16 5293 22824 420873 557144 64 32 3560 77676 942521 852702 64 64 4330 86235 998622 695778 128 4 10014 12175 234768 176092 128 8 5169 23117 422464 627328 128 16 3442 19913 633247 219956 128 32 8778 36322 857887 983630 128 64 12674 120298 1220700 569439 128 128 6446 42622 1373754 1579934 256 4 9661 6621 268113 233787 256 8 10271 28450 385571 287265 256 16 7901 25692 312515 155709 256 32 23889 31817 327379 86370 256 64 10886 73479 1027695 714967 256 128 24608 22846 1248819 254211 256 256 21831 131283 1570244 1137672 512 4 8062 9554 258458 82169 512 8 10997 10515 249046 218133 512 16 11893 38817 464239 361541 512 32 35553 25600 890404 856319 512 64 18529 24437 1086890 765371 512 128 31164 86865 1326585 1147892 512 256 22423 57638 1467055 519744 512 512 22543 114796 616950 575300 1024 4 7660 9825 89753 142279 1024 8 11431 11332 396624 81574 1024 16 15186 18619 930894 243688 1024 32 19356 20797 1174513 492327 1024 64 51264 88374 1367037 257804 1024 128 40368 81893 1245710 1148139 1024 256 25164 56054 1029029 622115 1024 512 17162 132643 937600 1528019 2048 4 8928 9881 132051 146641 2048 8 12021 12510 250612 231935 2048 16 13692 20532 135917 249151 2048 32 20510 30546 822805 426833 2048 64 24524 50042 552165 481773 2048 128 25249 51152 936048 1089981 2048 256 18137 55499 505177 1264935 2048 512 26547 48400 978597 915595 4096 4 7713 6562 62356 132171 4096 8 12368 14962 176271 183809 4096 16 16970 26850 405780 261673 4096 32 19867 24444 429080 309810 4096 64 21897 36442 360249 585049 4096 128 34634 53763 674572 351889 4096 256 25296 59462 894887 847894 4096 512 31649 62868 841045 812524 8192 4 1964 8920 102453 162794 8192 8 11717 13173 191272 210089 8192 16 16559 22595 346267 273530 8192 32 23933 43022 549581 573151 8192 64 20293 40856 322545 592758 8192 128 36696 41386 1097832 993923 8192 256 33533 55951 780942 668844 8192 512 36491 61687 1320015 492247 16384 4 9302 9043 171506 155880 16384 8 11218 15690 273893 283102 16384 16 20904 22002 378059 239753 16384 32 20882 26153 482889 448350 16384 64 28054 44778 818958 521203 16384 128 25859 35853 525162 1010791 16384 256 37914 58100 564167 696303 16384 512 38867 52080 1440726 593387 32768 4 7936 7493 102546 161469 32768 8 14934 14653 284503 222852 32768 16 17599 20456 393698 208035 32768 32 19969 30915 477869 564002 32768 64 31205 50766 522508 523467 32768 128 29488 38642 572937 320203 32768 256 30872 45689 951807 787183 32768 512